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Incorporation of La3+ into a Pt/CeO2/Al2O3 catalyst

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Abstract

The effects of La3+ incorporation into a Pt/CeO2/Al2O3 catalyst were investigated by a combination of activity, temperature-programmed reduction (TPR), oxygen storage capacity (OSC), noble-metal surface area, and X-ray diffraction (XRD) measurements. Incorporation of La3+ ions into the Al2O3, before CeO2 is added, promoted higher Pt and CeO2 dispersions. The oxygen storage capacity was also higher in the presence of La3+. This is attributed to a combination of Pt and CeO2 particle-size effects and possible blockage of the reaction between Al2O3 and CeO2. The XRD data show that La3+ forms LaAlO3 with Al2O3 and prevents α-Al2O3 formation after various heat treatments.

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Authors and Affiliations

  1. Ford Research Laboratory, Ford Motor Company, MD3179, PO Box 2053, 48121-2053, Dearborn, MI, USA

    R. K. Usmen, G. W. Graham, W. L. H. Watkins & R. W. McCabe

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  1. R. K. Usmen
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  2. G. W. Graham
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  3. W. L. H. Watkins
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  4. R. W. McCabe
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Usmen, R.K., Graham, G.W., Watkins, W.L.H. et al. Incorporation of La3+ into a Pt/CeO2/Al2O3 catalyst. Catal Lett 30, 53–63 (1994). https://doi.org/10.1007/BF00813672

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  • DOI: https://doi.org/10.1007/BF00813672

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